US4768133A - Lighting device - Google Patents

Lighting device Download PDF

Info

Publication number
US4768133A
US4768133A US07/013,942 US1394287A US4768133A US 4768133 A US4768133 A US 4768133A US 1394287 A US1394287 A US 1394287A US 4768133 A US4768133 A US 4768133A
Authority
US
United States
Prior art keywords
light
lighting device
light pipe
pipe
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/013,942
Inventor
Ronald H. Simons
Basil S. Wilkinson
Ivor C. Henry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thorn EMI PLC
Original Assignee
Thorn EMI PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thorn EMI PLC filed Critical Thorn EMI PLC
Assigned to THORN EMI PLC reassignment THORN EMI PLC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HENRY, IVOR C., SIMONS, RONALD H., WILKINSON, BASIL S.
Application granted granted Critical
Publication of US4768133A publication Critical patent/US4768133A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/18—Visual or acoustic landing aids
    • B64F1/20—Arrangement of optical beacons
    • B64F1/205—Arrangement of optical beacons arranged underground, e.g. underground runway lighting units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/18—Visual or acoustic landing aids
    • B64F1/20—Arrangement of optical beacons
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/20—Use of light guides, e.g. fibre-optic devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
    • E01F9/559—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members illuminated
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/06—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for aircraft runways or the like

Definitions

  • the present invention relates to a lighting device and it relates particularly to a lighting device suitable for use in connection with airport runways and the like to delineate or indicate runway edges and centre lines. Such devices are useful to aid pilots during landing and manoeuvreing after landing.
  • a typical lighting device is designed to be mounted in a hole in the ground with only an upper portion from which light is emitted extending above ground level.
  • An example of such a lighting device is disclosed in our United Kingdom Pat. No. 1270658 which is, in fact, bi-directional and comprises a robust housing assembly, a light source of 100 to 200 W and a simple optical assembly.
  • An object of this invention is to provide an airport lighting device having at least in some respects some of the attributes mentioned above.
  • a lighting device comprising a housing and an optical assembly in the housing, wherein the optical assembly includes a light source for producing a beam of light, a light pipe arranged to guide said beam parallel to a longitudinal axis of the assembly, a dichroic filter interposed between an end of the light pipe and the source, and an end arrangement for the light pipe effective to direct light, guided along the light pipe, in a predetermined direction.
  • the end arrangement may direct light in a direction orthogonal to said longitudinal axis.
  • the lamp is located between two lenses and coloured glass filters.
  • Dichroic colour filters which would have higher transmittance cannot be used because of the relatively large angles of incidence producing undesirably large colour changes.
  • FR No. 2542-063-A a transparent block is used with an unpolished inclined edge to provide a diffuse light for interior lighting and advertising
  • European Patent Application No. EP-115-843-A discloses a driven optically conductive rod with an inclined light reflecting end used to provide time shared light in the cultivation of tomatoes. None of these applications describe or suggest the use of a light rod to solve a particular problem in runway lighting devices. Moreover, the usefullness of the light rod in the prior applications resides in the ability of the rod to transmit light to remote locations. There is no suggestion of using a light rod to provide a compact means of distributing light bi-directionally or omnidirectionally other than in conjunction with a driven rotary member.
  • FIG. 1 is a sectional view of an assembled airport lighting device in accordance with the invention.
  • FIG. 2 is a pictorial view of an optical assembly for use in the lighting device of FIG. 1.
  • FIG. 3 is a sectional view of the optical assembly of FIG. 2.
  • FIG. 4 is a view of an alternative form of tip member used in the optical assembly of FIG. 2.
  • FIG. 6 is a plan view of an airport lighting device for use on curved sections of runway.
  • FIG. 7 is a plan view of prisms used in the device of FIG. 6.
  • FIG. 8 is an optical assembly for use in the airport lighting device of FIG. 6.
  • FIG. 9 is a perspective view of one of the prisms in FIG. 7.
  • FIG. 5 is a view of an alternative form of tip member.
  • reference numeral 10 depicts generally an airport lighting device comprising a housing 11, optical assembly 12 located in a well 13 of housing 11 by screws 20 and a light source 14.
  • the airport lighting device 10 sits in a recess 15 in a runway 16 and light is emitted from dome 17 just above the surface of the runway 16.
  • Optical assembly 12 is shown in greater detail in FIG. 2 and comprises a flat light metal frame 18 to which bracket 19 of similar metal is attached by screws 20.
  • a light pipe 21 is carried by spring clips 22 attached to bracket 19 which also supports a further bracket 23 best shown in FIG. 3.
  • Bracket 23 also carries spring clips 24 which secure light source 14 in alignment with light pipe 21.
  • Light source 14 is, in fact, a tungsten halogen reflector lamp 25 and because it more nearly simulates a point source and because the reflector 26 is in alignment and light is transmitted parallel, to the longitudinal axis of light pipe the overall efficiency of the lighting device is enhanced.
  • a 36 W tungsten halogen lamp in the arrangement of the present invention can be substituted for the 100 to 200 W light source of the prior art device described in the aforesaid U.K. Pat. No. 1270658.
  • the tungsten halogen incandescent reflector lamp emits light parallel to the light pipe 21 a dichroic filter 27 can be interposed between the end 28 of the light pipe 21 and the reflector lamp 25 and supported also from bracket 23. This substantially solves the aforementioned colour changing problem and also improves the efficiency of the device because the dichroic filter has a transmission of about double that of the aforementioned glass filter.
  • Light pipe 21 can be made from a single piece of transparent rod i.e. glass or quartz rod or it can be made from a cylindrical length of transparent rod to which is joined a tip member 29 for example, by a suitable adhesive dependant on the refractive index of the material.
  • the tip member 29 is in the form of a cylindrical plug 30 of quartz or glass having an internal V-shaped axially aligned depression 31 with the particular angle of the V depending on the refractive index of the material.
  • the material is quartz and the angle is 42°.
  • the V-shaped depression takes the parallel beams of light from the reflector lamp 25 and turns them through 90° to emit light around a 360° circumference when looked at in the plan view.
  • FIG. 4 shows an alternative form of tip 32 having an external apex 33. Testing has shown that tip 29 with the internal depression 31 is about 60% efficient whereas the external tip 32 is only about 30% efficient which is surprising since theoretically the efficiency should be about the same.
  • FIG. 5 shows an alternative form of light pipe having a rectangular section with a tip member 36. Tip 36 has a horizontal V-shaped groove 37 which produces a bi-directional beam. Such a horizontal V-shaped groove could be produced in a circular section light pipe. Tip 36 can be made complete with integral lens portion 38, shown dotted.
  • the approach lights on a runway are located on elevated stands, sometimes as high as twenty feet or more. Under these circumstances it is useful to have the light source at ground level and to lead the light to the elevated distribution point by means of a relatively long light pipe. Because the light pipe has to withstand wind forces in these remote parts of the runway and because of the relatively long vertical runs of the pipe the usual glass or quartz rod does not have sufficient structural strength and, indeed, dependent on the length, could be too expensive to be commercially viable. Accordingly the transparent rod has to be reinforced, for example, by being encased in a metal sheath. Alternatively the light pipe could be in the form of a suitably strong tube with an appropriate specular internal finish.
  • FIG. 4 shows external tip 32 fitted to the end of a metal tube 39 having an aluminised internal surface 40.
  • the tube would have a nominal diameter of 3 inches.
  • FIG. 8 there is shown an assembly comprising a tungsten halogen reflector lamp 42, dichroic filter 43, a short length of light pipe 44 made of glass and left and right handed glass prisms 45,46 respectively.
  • the prisms are assembled loosely together which is useful if they have to be changed, for example, to provide different coloured beams. Facets 47,48 and 49 produce the required amount of angling as shown in FIG. 7.
  • a right handed prism 46 is shown in perspective view in FIG. 9. In some cases the light pipe 44 may be omitted and the prisms 45, 46 can be used in combination with the assembly comprising tungsten halogen reflector lamp 42 and dichroic filter 43.
  • light metal frame 18 of FIG. 2 with the assembled optical devices will quickly give up heat generated by light source 14 to the more substantial housing 11 which thus acts as a heat sink.
  • upward passage of heat into frame 18 can be retarded by using a dichroic heat screen instead of or additional to dichroic colour filter 27. It is useful to keep housing 11 cool in the event of aeroplanes inadvertently parking with their tyres on or close to the housing 11 which might well damage the tyres if such parking persisted for a lengthy period.
  • the ability of the light pipe to transmit light ⁇ cold ⁇ also helps in this respect.
  • a lighting device in accordance with the invention could alternatively be used as a lane indicator lamp in a road or motorway.

Abstract

A lighting device includes a light pipe and a tungsten halogen reflector lamp transmitting light beams parallel with the axis of the light pipe. This allows the use of a dichroic filter which provides for an increased transmission whereby low wattage lamps (36 w) can be used instead of the more usual 100 to 200 w light sources. A number of shaped prisms can be used as end arrangements whereby different effects are obtained, for example, bi-directional, omni-directional or angled beams can be provided.

Description

The present invention relates to a lighting device and it relates particularly to a lighting device suitable for use in connection with airport runways and the like to delineate or indicate runway edges and centre lines. Such devices are useful to aid pilots during landing and manoeuvreing after landing. A typical lighting device is designed to be mounted in a hole in the ground with only an upper portion from which light is emitted extending above ground level. An example of such a lighting device is disclosed in our United Kingdom Pat. No. 1270658 which is, in fact, bi-directional and comprises a robust housing assembly, a light source of 100 to 200 W and a simple optical assembly.
Because of the increase in air traffic it has become necessary to operate the aircraft in less than ideal conditions, for example, modern landing techniques allow aircraft to be landed in fog. Once on the ground, however, the pilot has to see to manoeuvre and in the poorer ambient conditions it has become necessary to increase the lighting effect. At the same time, however, because of the increase in airport acreage many more lighting devices are needed so that on the other hand for economy reasons it would be desirable to reduce the power of individual light source. A reduction in the power of the light source and a more efficient package therefore would be desirable.
An object of this invention is to provide an airport lighting device having at least in some respects some of the attributes mentioned above.
According to the present invention there is provided a lighting device comprising a housing and an optical assembly in the housing, wherein the optical assembly includes a light source for producing a beam of light, a light pipe arranged to guide said beam parallel to a longitudinal axis of the assembly, a dichroic filter interposed between an end of the light pipe and the source, and an end arrangement for the light pipe effective to direct light, guided along the light pipe, in a predetermined direction. The end arrangement may direct light in a direction orthogonal to said longitudinal axis.
In the known arrangement described above, the lamp is located between two lenses and coloured glass filters. Dichroic colour filters which would have higher transmittance cannot be used because of the relatively large angles of incidence producing undesirably large colour changes.
It has been proposed that a possible solution would be the use of a single large light source and to lead off the light to various locations by means of fibre optics. Such a solution is not practicable because of the severe attenuation which would occur over long lengths of fibre.
So called light pipes or rods have been proposed for various applications, for example, in European Patent Application No. 115,296A mention is made of a quartz rod to transmit light to remote locations without any transfer of heat and without the hazard of electrical connections to replace explosion proof or water proof lighting equipment.
In FR No. 2542-063-A a transparent block is used with an unpolished inclined edge to provide a diffuse light for interior lighting and advertising and European Patent Application No. EP-115-843-A discloses a driven optically conductive rod with an inclined light reflecting end used to provide time shared light in the cultivation of tomatoes. None of these applications describe or suggest the use of a light rod to solve a particular problem in runway lighting devices. Moreover, the usefullness of the light rod in the prior applications resides in the ability of the rod to transmit light to remote locations. There is no suggestion of using a light rod to provide a compact means of distributing light bi-directionally or omnidirectionally other than in conjunction with a driven rotary member.
An embodiment of the present invention will now be described by way of example only and with reference to the under-noted drawings wherein:
FIG. 1 is a sectional view of an assembled airport lighting device in accordance with the invention.
FIG. 2 is a pictorial view of an optical assembly for use in the lighting device of FIG. 1.
FIG. 3 is a sectional view of the optical assembly of FIG. 2.
FIG. 4 is a view of an alternative form of tip member used in the optical assembly of FIG. 2.
FIG. 6 is a plan view of an airport lighting device for use on curved sections of runway.
FIG. 7 is a plan view of prisms used in the device of FIG. 6.
FIG. 8 is an optical assembly for use in the airport lighting device of FIG. 6.
FIG. 9 is a perspective view of one of the prisms in FIG. 7.
FIG. 5 is a view of an alternative form of tip member.
In FIG. 1, reference numeral 10 depicts generally an airport lighting device comprising a housing 11, optical assembly 12 located in a well 13 of housing 11 by screws 20 and a light source 14. The airport lighting device 10 sits in a recess 15 in a runway 16 and light is emitted from dome 17 just above the surface of the runway 16.
Optical assembly 12 is shown in greater detail in FIG. 2 and comprises a flat light metal frame 18 to which bracket 19 of similar metal is attached by screws 20. A light pipe 21 is carried by spring clips 22 attached to bracket 19 which also supports a further bracket 23 best shown in FIG. 3. Bracket 23 also carries spring clips 24 which secure light source 14 in alignment with light pipe 21. Light source 14 is, in fact, a tungsten halogen reflector lamp 25 and because it more nearly simulates a point source and because the reflector 26 is in alignment and light is transmitted parallel, to the longitudinal axis of light pipe the overall efficiency of the lighting device is enhanced. In this regard it has been found a 36 W tungsten halogen lamp in the arrangement of the present invention can be substituted for the 100 to 200 W light source of the prior art device described in the aforesaid U.K. Pat. No. 1270658. Moreover, because the tungsten halogen incandescent reflector lamp emits light parallel to the light pipe 21 a dichroic filter 27 can be interposed between the end 28 of the light pipe 21 and the reflector lamp 25 and supported also from bracket 23. This substantially solves the aforementioned colour changing problem and also improves the efficiency of the device because the dichroic filter has a transmission of about double that of the aforementioned glass filter.
Light pipe 21 can be made from a single piece of transparent rod i.e. glass or quartz rod or it can be made from a cylindrical length of transparent rod to which is joined a tip member 29 for example, by a suitable adhesive dependant on the refractive index of the material. In FIGS. 2 and 3 the tip member 29 is in the form of a cylindrical plug 30 of quartz or glass having an internal V-shaped axially aligned depression 31 with the particular angle of the V depending on the refractive index of the material. In the present example the material is quartz and the angle is 42°. The V-shaped depression takes the parallel beams of light from the reflector lamp 25 and turns them through 90° to emit light around a 360° circumference when looked at in the plan view. Thus from a static light source 14 an omni-directional beam of light can be provided by means of tip 29. An alternative form of tip 32 is shown in FIG. 4 having an external apex 33. Testing has shown that tip 29 with the internal depression 31 is about 60% efficient whereas the external tip 32 is only about 30% efficient which is surprising since theoretically the efficiency should be about the same. FIG. 5 shows an alternative form of light pipe having a rectangular section with a tip member 36. Tip 36 has a horizontal V-shaped groove 37 which produces a bi-directional beam. Such a horizontal V-shaped groove could be produced in a circular section light pipe. Tip 36 can be made complete with integral lens portion 38, shown dotted.
In contrast to the previously described embodiments where compact light sources are located at ground level the approach lights on a runway are located on elevated stands, sometimes as high as twenty feet or more. Under these circumstances it is useful to have the light source at ground level and to lead the light to the elevated distribution point by means of a relatively long light pipe. Because the light pipe has to withstand wind forces in these remote parts of the runway and because of the relatively long vertical runs of the pipe the usual glass or quartz rod does not have sufficient structural strength and, indeed, dependent on the length, could be too expensive to be commercially viable. Accordingly the transparent rod has to be reinforced, for example, by being encased in a metal sheath. Alternatively the light pipe could be in the form of a suitably strong tube with an appropriate specular internal finish. Because of the length involved there is a requirement for increased power and a tungsten halogen incandescent reflector lamp of 50-70 W would be used in combination with a 2-3" dia reflector. However, because of the increased efficiency of the arrangement of the present invention due to the use of the dichroic filter in combination with a parallel light beam this is still less than 100-200 W light source of the aforementioned prior art arrangement.
FIG. 4 shows external tip 32 fitted to the end of a metal tube 39 having an aluminised internal surface 40. In this embodiment the tube would have a nominal diameter of 3 inches.
In the particular case where the lighting device is to be used on curved sections of airport runways it is useful to provide a lighting device where the light beams are angled to the axis of the light fitting. They have to be "toed in" and "toed out" as indicated by the arrows shown in the lighting device 41 of FIG. 6. This "toeing" or angling can be accomplished by the use of offsetting prisms shown in FIGS. 7, 8 and 9. In FIG. 8 there is shown an assembly comprising a tungsten halogen reflector lamp 42, dichroic filter 43, a short length of light pipe 44 made of glass and left and right handed glass prisms 45,46 respectively. The prisms are assembled loosely together which is useful if they have to be changed, for example, to provide different coloured beams. Facets 47,48 and 49 produce the required amount of angling as shown in FIG. 7. A right handed prism 46 is shown in perspective view in FIG. 9. In some cases the light pipe 44 may be omitted and the prisms 45, 46 can be used in combination with the assembly comprising tungsten halogen reflector lamp 42 and dichroic filter 43.
It will be appreciated that light metal frame 18 of FIG. 2 with the assembled optical devices will quickly give up heat generated by light source 14 to the more substantial housing 11 which thus acts as a heat sink. Moreover, upward passage of heat into frame 18 can be retarded by using a dichroic heat screen instead of or additional to dichroic colour filter 27. It is useful to keep housing 11 cool in the event of aeroplanes inadvertently parking with their tyres on or close to the housing 11 which might well damage the tyres if such parking persisted for a lengthy period. The ability of the light pipe to transmit light `cold` also helps in this respect.
A lighting device in accordance with the invention could alternatively be used as a lane indicator lamp in a road or motorway.

Claims (11)

We claim:
1. A lighting device comprising a housing and an optical assembly in the housing, wherein the optical assembly includes a light pipe having a first end and a second end opposite said first end and a longitudinal axis between said first end and said second end; a light source for producing a beam of light, the light source being positioned at said first end of said light pipe, the light pipe being arranged to guide said beam parallel to said longitudinal axis of the light pipe; a dichroic filter interposed between said first end of the light pipe and the light source; and an end arrangement positioned at said second end of the light pipe, said end arrangement being effective to direct light, emergent from said second end, in a predetermined direction away from said longitudinal axis.
2. A lighting device according to claim 1 wherein said end arrangement directs light in a direction orthogonal to said longitudinal axis.
3. A lighting device according to claim 1 wherein the end arrangement directs the light beam bi-directionally.
4. A lighting device according to claim 1 wherein the end arrangement directs the light beam around a 360° circumference.
5. A lighting device according to claim 1 wherein said end arrangement comprises left and right hand facetted prisms for directing the light beam in respective directions.
6. A lighting device according to claim 1 including a heat screen.
7. A lighting device according to claim 1 wherein the end arrangement includes a prism having a V-shaped formation.
8. A lighting device according to claim 7 wherein the V-shaped formation is an internal depression.
9. A lighting device according to claim 1 wherein the light pipe is reinforced in a metal sheath.
10. A lighting device according to claim 1 wherein the light pipe is a quartz or glass rod.
11. A lighting device according to claim 1 wherein the light pipe is a metal tube.
US07/013,942 1986-02-13 1987-02-12 Lighting device Expired - Lifetime US4768133A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8603507 1986-02-13
GB868603507A GB8603507D0 (en) 1986-02-13 1986-02-13 Airport lighting device

Publications (1)

Publication Number Publication Date
US4768133A true US4768133A (en) 1988-08-30

Family

ID=10592966

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/013,942 Expired - Lifetime US4768133A (en) 1986-02-13 1987-02-12 Lighting device

Country Status (5)

Country Link
US (1) US4768133A (en)
EP (1) EP0233001A3 (en)
JP (1) JPS62193007A (en)
FI (1) FI91103C (en)
GB (2) GB8603507D0 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739023A1 (en) * 1997-09-06 1999-03-11 Hella Kg Hueck & Co Reflector lamp
US20030169602A1 (en) * 2000-05-08 2003-09-11 Farlight Llc Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore
US7083315B2 (en) 2001-03-26 2006-08-01 Siemens Airfield Solutions Elevated airfield runway and taxiway edge-lights utilizing light emitting diodes
US20070253168A1 (en) * 2006-04-28 2007-11-01 Tyco Electronics Corporation Integrated heat sink and light pipe mounting assembly
US20080192480A1 (en) * 2000-05-08 2008-08-14 Alexander Rizkin Led light module for omnidirectional luminaire
US7822335B1 (en) 2006-09-21 2010-10-26 Microscan Systems, Inc. Lens protector
US8107808B2 (en) 2009-07-10 2012-01-31 Microscan Systems, Inc. Combination dark field and bright field illuminator
US20130223092A1 (en) * 2012-02-27 2013-08-29 Rosenberger-Osi Gmbh & Co. Ohg Aviation obstruction lighting
US8768159B2 (en) 2009-07-10 2014-07-01 Microscan Systems, Inc. Combination dark field and bright field illuminator
US20150009705A1 (en) * 2013-07-02 2015-01-08 Toshiba Lighting & Technology Corporation Light Emitting Device and Lighting Device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126459A1 (en) * 1991-08-09 1993-02-11 Aqua Signal Ag LIGHTING BODY, IN PARTICULAR UNDERFLOOR LAMP
EP0718546A1 (en) * 1994-12-23 1996-06-26 Siemens Aktiengesellschaft Method for using light radiation aimed at colour signalling and device therefor
GB9917563D0 (en) * 1999-07-27 1999-09-29 Fibre Optic Lamp Company Fibre optic lamps
US20080074898A1 (en) 2006-06-02 2008-03-27 Bookham Technology Plc Light source assemblies

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1270658A (en) * 1968-07-23 1972-04-12 Thorn Lighting Ltd Lighting device
US4141058A (en) * 1976-05-17 1979-02-20 Copal Company Limited Light diffusing device
US4460940A (en) * 1981-11-07 1984-07-17 Kei Mori Apparatus for uniform illumination employing light diffuser
US4461974A (en) * 1982-06-09 1984-07-24 David Chiu Dual light source
EP0115296A1 (en) * 1983-01-20 1984-08-08 Kei Mori Artificial light source device
EP0115843A2 (en) * 1983-02-04 1984-08-15 Kei Mori Apparatus for time-sharing light distribution
FR2542063A1 (en) * 1983-03-04 1984-09-07 Chevrillon Monique Anti-dazzle lighting device
US4500167A (en) * 1981-11-14 1985-02-19 Kei Mori Optical energy collecting and transmitting apparatus using tubular _light transmitting element
US4664470A (en) * 1984-06-21 1987-05-12 General Electric Company Method and system for structured radiation production including a composite filter and method of making

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357423A (en) * 1965-03-26 1967-12-12 Iota Cam Corp Surgical light pipe and the like
DE2327930A1 (en) * 1973-06-01 1975-01-02 Hermann Nier Warning light for building sites - top reflector cone adapts light distribution to warning requirements
CH618654A5 (en) * 1976-09-17 1980-08-15 Erni & Co Elektro Ind
US4084215A (en) * 1977-02-25 1978-04-11 The United States Of America As Represented By The Secretary Of The Navy Strobe light having reduced electromagnetic radiation
US4344110A (en) * 1979-12-31 1982-08-10 Ruediger Dennis W Supplemental identification system for channel and similar marker lights
JPS59127007A (en) * 1983-01-11 1984-07-21 Nec Corp Dichroic filter
JPS6071397A (en) * 1983-09-28 1985-04-23 東芝ライテック株式会社 Indicator for angle of approach
US4561043A (en) * 1984-09-27 1985-12-24 Thompson Gary J Decorative light display

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1270658A (en) * 1968-07-23 1972-04-12 Thorn Lighting Ltd Lighting device
US4141058A (en) * 1976-05-17 1979-02-20 Copal Company Limited Light diffusing device
US4460940A (en) * 1981-11-07 1984-07-17 Kei Mori Apparatus for uniform illumination employing light diffuser
US4500167A (en) * 1981-11-14 1985-02-19 Kei Mori Optical energy collecting and transmitting apparatus using tubular _light transmitting element
US4461974A (en) * 1982-06-09 1984-07-24 David Chiu Dual light source
EP0115296A1 (en) * 1983-01-20 1984-08-08 Kei Mori Artificial light source device
EP0115843A2 (en) * 1983-02-04 1984-08-15 Kei Mori Apparatus for time-sharing light distribution
FR2542063A1 (en) * 1983-03-04 1984-09-07 Chevrillon Monique Anti-dazzle lighting device
US4664470A (en) * 1984-06-21 1987-05-12 General Electric Company Method and system for structured radiation production including a composite filter and method of making

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739023A1 (en) * 1997-09-06 1999-03-11 Hella Kg Hueck & Co Reflector lamp
US8220959B2 (en) 2000-05-08 2012-07-17 Farlight Llc Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore
US6951418B2 (en) * 2000-05-08 2005-10-04 Farlight Llc Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore
US20100290225A1 (en) * 2000-05-08 2010-11-18 Alexander Rizkin Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore
US8360615B2 (en) 2000-05-08 2013-01-29 Farlight, Llc LED light module for omnidirectional luminaire
US20080192467A1 (en) * 2000-05-08 2008-08-14 Alexander Rizkin Portable luminaire
US20080192480A1 (en) * 2000-05-08 2008-08-14 Alexander Rizkin Led light module for omnidirectional luminaire
US20030169602A1 (en) * 2000-05-08 2003-09-11 Farlight Llc Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore
US7744246B2 (en) 2000-05-08 2010-06-29 Farlight, Llc Portable luminaire
US7083315B2 (en) 2001-03-26 2006-08-01 Siemens Airfield Solutions Elevated airfield runway and taxiway edge-lights utilizing light emitting diodes
US20070253168A1 (en) * 2006-04-28 2007-11-01 Tyco Electronics Corporation Integrated heat sink and light pipe mounting assembly
US7529094B2 (en) * 2006-04-28 2009-05-05 Tyco Electronics Corporation Integrated heat sink and light pipe mounting assembly
US7822335B1 (en) 2006-09-21 2010-10-26 Microscan Systems, Inc. Lens protector
US8107808B2 (en) 2009-07-10 2012-01-31 Microscan Systems, Inc. Combination dark field and bright field illuminator
US8768159B2 (en) 2009-07-10 2014-07-01 Microscan Systems, Inc. Combination dark field and bright field illuminator
US8989569B2 (en) 2009-07-10 2015-03-24 Microscan Systems, Inc. Combination dark field and bright field illuminator
US9239143B2 (en) * 2012-02-27 2016-01-19 Rosenberger-Osi Gmbh & Co. Ohg Aviation obstruction lighting
US20130223092A1 (en) * 2012-02-27 2013-08-29 Rosenberger-Osi Gmbh & Co. Ohg Aviation obstruction lighting
US20150009705A1 (en) * 2013-07-02 2015-01-08 Toshiba Lighting & Technology Corporation Light Emitting Device and Lighting Device

Also Published As

Publication number Publication date
GB8603507D0 (en) 1986-03-19
FI870452A0 (en) 1987-02-02
JPS62193007A (en) 1987-08-24
FI91103B (en) 1994-01-31
EP0233001A3 (en) 1989-04-19
GB2186676B (en) 1990-07-11
GB2186676A (en) 1987-08-19
FI91103C (en) 1994-05-10
FI870452A (en) 1987-08-14
EP0233001A2 (en) 1987-08-19
GB8702680D0 (en) 1987-03-11

Similar Documents

Publication Publication Date Title
US4768133A (en) Lighting device
US1941079A (en) Lighting apparatus employing rectilinear light sources
EP2918903B1 (en) Illumination device
KR0184259B1 (en) Pole light providing unique footprint control
US20070121329A1 (en) Airfield edge-light utilizing a side-emitting light source
AU622388B2 (en) Direction dependent line light source
US4166324A (en) Illuminated sight
US4408266A (en) Optical system for airport semi-flush approach lights
KR930003265B1 (en) Static multi-color light signal
US4701832A (en) Luminaire for roadway and area lighting
US4161770A (en) Guide signal devices
CN105934627A (en) Lighting unit, especially for road illumination
GB2051447A (en) Optical display apparatus
US2102975A (en) Visible signal
JP2009302063A (en) Beam former for remote lighting method and device
US2099671A (en) Antenna system
US6111705A (en) Light emitting device, in particular a lamp or lantern
KR20200020506A (en) Traffic signal device of auxiliary traffic signal for light irradiation of the road surface
US4420740A (en) Obstruction warning system
JP3137848B2 (en) Light cube module
AU713963B2 (en) Lighting device, in particular a flush-marker light with spatially oriented light distribution
US10654591B2 (en) Precision approach path indicator with a novel reflector arrangement
GB2040490A (en) Prism for Use With a Light Guide
WO2006045897A1 (en) Light emitting device and method for directing light
US4261027A (en) Incandescent reflector lamp for railway warning-signal apparatus

Legal Events

Date Code Title Description
AS Assignment

Owner name: THORN EMI PLC, THORN EMI HOUSE, UPPER SAINT MARTIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:SIMONS, RONALD H.;WILKINSON, BASIL S.;HENRY, IVOR C.;REEL/FRAME:004667/0301

Effective date: 19870204

Owner name: THORN EMI PLC,ENGLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SIMONS, RONALD H.;WILKINSON, BASIL S.;HENRY, IVOR C.;REEL/FRAME:004667/0301

Effective date: 19870204

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12